Accepting request 955956 from home:Pharaoh_Atem:branches:multimedia:libs

- Add patch to fix error returned with bad versions of OpenH264
  + Patch: ffmpeg-openh264-averr-on-bad-version.patch
- Enable OpenH264 as an H.264 codec via dlopen using patch from Fedora
  + Patch: ffmpeg-dlopen-openh264.patch
- Add source and script for headers for dlopening OpenH264
  + Source: ffmpeg-dlopen-headers.tar.xz
  + Source: ffmpeg_get_dlopen_headers.sh

OBS-URL: https://build.opensuse.org/request/show/955956
OBS-URL: https://build.opensuse.org/package/show/multimedia:libs/ffmpeg-5?expand=0&rev=7

ffmpeg_get_dlopen_headers.sh

@@ -0,0 +1,42 @@
+#!/bin/bash
+
+# Script to grab headers from existing packages to support dlopen() codec libraries
+# Requires: bash, coreutils, curl, bsdtar, dnf, dnf-plugins-core, tar
+# Author: Neal Gompa <ngompa@fedoraproject.org>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+echo "Setting up..."
+# Get local directory
+LOCALDIR=$(realpath $(dirname $0))
+
+# Create working area
+TMPDIR=$(mktemp -d /tmp/mmheadersXXXXXX)
+mkdir -pv $TMPDIR
+
+echo "Fetching headers..."
+# Get OpenH264 headers
+OPENH264_DEVEL=$(dnf -q download --url 'pkgconfig(openh264)')
+curl -L $OPENH264_DEVEL | bsdtar -xvf - --include "./usr/include/*" -C $TMPDIR
+
+echo "Generating tarball..."
+# Prep tarball tree
+mv -v ${TMPDIR}/usr ${TMPDIR}/ffdlopenhdrs
+# Generate tarball
+tar --transform "s|^${TMPDIR#?}/||" -cJvf ${LOCALDIR}/ffmpeg-dlopen-headers.tar.xz ${TMPDIR}/ffdlopenhdrs
+# Clean up
+echo "Cleaning up..."
+rm -rfv ${TMPDIR}
+
+echo "Tarball created: ${LOCALDIR}/ffmpeg-dlopen-headers.tar.xz"